Identifies articles, books and other publications on geology and earth sciences. North American coverage is from 1785 to present; coverage for other areas of the world is from 1933 to present. Indexed material includes journal articles, books, conference proceedings, theses, and others. The database is the equivalent of four major reference publications: Bibliography of North American Geology. Bibliography and Index of Geology Exclusive of North America, Geophysical Abstracts, and the Bibliography and Index of Geology. Information from additional sources is included.